问题
单项选择题
3ºBe'表示()
A、相对密度为3%
B、质量分数为3%
C、体积分数为3%
D、物质的量浓度为3mol/L
答案
参考答案:B
3ºBe'表示()
A、相对密度为3%
B、质量分数为3%
C、体积分数为3%
D、物质的量浓度为3mol/L
参考答案:B
从方框中选择最佳选项完成对话,有两项多余。 | |
B: 1_____ A: He's from France. B: 2_____ A: He speaks French and a little Chinese. B: 3_____ A: Yes, He likes animals Very much. 4_____ B: 5_____ A: Pandas. And he'll come to China to see them. B: Oh, I like pandas too. Can I know him? A: Sure. B: Thank you. |